ASP.NET 核心：创建带有无效日期的 JWT 令牌

Question

I'm trying to get an JWT token:

public async Task<string> GetAccessToken()
{
    var exp = await context.GetTokenAsync("expires_at");
    var expires = DateTime.Parse(exp);

    if (expires > DateTime.Now)
    {
        return await context.GetTokenAsync(OpenIdConnectParameterNames.AccessToken);
    }

    return await GetRefreshedAccessToken();
}

But when I put the JWT string that was accepted in the token in https://token.dev/

I get invalid date on "auth_time" - why and how can I fix it?

Answer 1

In JWT, the fields about time are in Unix Timestamp format.

You need to convert your time to this format.

[HttpGet("GetUnixTimeStamp")]
public string GetAccessToken()
{
    string dateStart = DateTime.UtcNow.ToString("yyyy-MM-ddTHH:mm:sszzz");
    DateTime Start = DateTime.ParseExact(dateStart, "yyyy-MM-ddTHH:mm:sszzz", System.Globalization.CultureInfo.InvariantCulture);

    long unixStart = (long)Start
        .ToUniversalTime()
        .Subtract(DateTime.UnixEpoch)
        .TotalSeconds;
    return unixStart.ToString();
}